Picker motion for looms



March 30 1926.

. 1,579,078 7 S. CHRISMAN PICKER MOTION FOR LOOMS Filed Dem 8 1924 2 Sheets-Sheet 2 INVENToR )lnw'Ess v 5% 6 W I flrr RNEYS Patented Mar. so, was.

' UNITED' STATES PAIENToFFl-cfl srnwnnr cHRIs AN, or wn'rnntoo', NEW YORK.

PICKER MOTION ron Looms. 1

Application filed December a, 1924; Serial No. 754,628.

connection witli-;t he accompanying drawings, is a full, clear,- andexact description.

. This invention relates to a picker motion 'for looms and refers more particularly to the means for regulating the power and stroke of the picker staff for driving the shuttle through-the shed, Y 7

These picker sticks or staffs are usually operated with a parallel motion through the medium of a power driven sweepstick or operating bar having a terminallug strap loosely engaging the picker staiffor lengtha wise adjustment thereon to-fvary the power and stroke as may be required to impart the desired movement of the shuttle through its v guide. i

"It is found; however, thatjwhen the'lugstrap and its operating bar are adjusted as a'unit, the line of draft of the lug-strap-is frequently abnormal to the longitudinal edge of the picker staff and thatunder such con ditions, even though it maybe initially set to impart the desired power and stroke to the shuttle, its tendency is to shift more or :-less toward a position normal to the picker staff which results in varylng the power and stroke, destroying. the proper synchronism of action with relation to the decussation of the warp, and subjects the pickerstafl'to more or less excessive strains, all of which reduces the efficiency of the machine. and in 7 ing the some instances is the direct cause ofgbreakpicker-statf and unduly wearing-the lug stra w Themain object of the present invention is to obviate these objectionable resultsby' providing a more easily adjustable clamp connection between the lug-strap and its operating bar, and to cause said -connection,- when tightenechto. more firmly hold those parts in their adjusted position relatively to;

said bar. i Y 7 Another object is to support the clamp for the lug-strap directly upon an upright arm which is fulcrumed co axi'ally Withand extends upwardly along the picker staff so that the weight of the lug-strap and adj acenti end of the operating bar together with the cl mp w ll e transmitted through the arm to which the staff may be Set-.7,

directly to pivotal fulcrum common to both tliearmkand staff; and'therbyto turpositi-on to which itmay beset.

ther assist in holdingthe'lug-strap in any following description: 1 In tl1e,draw111gs-:-

motion for the multiple box side of a loom, the dotted lines indicatingdifferent'positions -Figures 2 and 3 are enlargeddetail sectional views taken{respectively on lines 22 and searig-une 1.- I Figure this a face view of'the detached coupling clamp for connecting the lug-strap and itsoperating. bar to theuprightarm: and for holdingthelug-strap in itsadjustedposition relatively to said-bar. I

Figure 5 is a side'elevation of a picker motion as used on the single box sideof the looms, jv f j 1 Figuresfi and ;7 are enlarged sectional views taken respectively :on} 'lin es.166"and 77', Figure 5. I 1o :Figure S is a. perspective view of the, bracket for connecting the parallel motion to the stall.

In both of the picker motions shown vin Figures 1 and San upright arm'1; is n11 CIlllTlQCl coaxially with the staff by Figure 1 is a sid-e: elevation ofapicker to receive onesideotthelug-strap between them. v

The 111 g-strap preterably consists one or more layers otheavy leather bent shapegtoembracethe-"ad acent portion oiifv the staff -2, and has its ends "overlapping upon opposite sidesof an operating bar 5 and pivotally' connected thereto by a pivotal bolt 6; Theioperatingbar i -H may be actuated by any'suitable meansas' for example, a-crank arm +7;- on suitable rock-shaft 8- whlch isipower driven by anywell-known ineansrtheiother end-of the bar being adapted to receive "the lug strap 4- and pivotal bolt "6, and coupled to the upper end'o'f tliearinl-' by means of a clamping plate 9 having, v

one end apertured for receiving 'theclamping bolt ,t6 .and its other end provided w h a pivotal stud l-O adapted'te as;

any one of a plurality of holes '11 in the adjacent portion of an arm '1, whereby the lug-strap 4E- and adjacent end of the operating bar 5- may be adjusted vertically along the power stick 2 and held many one of its adjusted. positions by the engagement of the luglO, in one of the apertures 1l-, which latter are arranged in vertically spaced relation lengthwise of the arm '1. i

The end of the clamping member '9'-' which is mounted upon the pivotal bolt able augularly about the axis of the pivotal bolt 6, While both of these parts are also adjustable angularly about the same axis relatively to the operating bar 5 by simply loosening said'bolt, but When the lugstrap and clamping plate are adjusted to the proper position to impart the desired power and stroke to the staff .2 the bolt may be tightened to hold the lug-strap and clamping plate in their adjusted positions; N

This mdependent angular adjustment of the clamping plate 9-- and lug-strap -l' about the axis of the bolt'6' permits. the clamping plate to be engaged in any one of the apertures 11 of the arm .1 and also: permits the lug-strap to be adjusted more nearly normal to the longitu-V dinal center of the staff. I

Any'suitable mechanism as A, Figure 1,

orA, Figure 5, maybe employed for sup porting the pivotal bolt 3 for the staff --2* andarm 1*.

The picker motion, as shown'in Figures 6 to 8 inclusive is substantially the same as that shown in Figures 1 to 4 inclusive, except that it is to be. used at the single side of the loom, and the same reference numeralsa'pply to both devices.- In Figure 5 however, the upper end of the picker stick is shown as provided With a plurality oflayers 13 of leather --forming the usualvmore' or less resilient contact-member for engag' ing and operating the shuttle along guide, and across the web.

Vhat, I claim is:

,1; In a picker meson for 160m a: pickerstaff and upright 'ann both fnle'rained to swing about one and the same axis, a lugstrap loosely embracing the picker-stick, an operating bar to Which the lug-strap is pivoted for angular adjustment thereon, means for reciprocating said bar and lugstrap for oscillating the picker-stalf, and a clamping plate pivoted to said bar and to the adjacent ends: of the lug-strap coaxial With the axis of movement of the lug-strap and interlocking connections between said clamping plate and arm. I v I V 2. In a picker motion for looms, a pickerstalf and an upright arm both pivoted to swing about a common axis, the said arm being extended along one side of the pickerstaff in spaced relation thereto and provided With a plurality of apertures in longitudinallyspaced relation, a reciprocally movable operating member adjustable lengthwise of said arm a coupling clamp having'one end pivoted to said member and itsother end provided with a pivotal stud engaging in one of the apertures of said forztrans- Initting motion thereto, and a 'lug-:strap operatively connected to said member and embracing the pic'kenstaif for imparting motion thereto. V I

3. In a picker motion for looms, apicken stafi and an upright arm both pivoted to swing abouta common axis, said armbe ing extended along "one side'ofthe pickerstaff in spaced relation thereto and1provided With a plurality of apertures in longi- I tudinally spaced relation, a I reciprocally movable 7 operating member adjustable lengthwise of said arm, a con p'ling clamp having one end pivoted to said member and its other end provided with a pivotal studengaging in one of the apertures of the said arm for transmitting motion thereto, a'lugstrap operatively connectedto saidjniemb'er and embracing the picker-staff for impart '7 7 ng motion thereof, said coupling clamp and,

lug-strap being movable about a common axis relatively to said operating arm;

4. In a picker motion for looms, a picker stick, an operatingbar, a lug strap pivoted to the bar for angular adjustment relatively thereto, clamping means for holding the lug strap in its adjusted position including a clampingplate mounted upon and adjust-s able to different angles relatively to the bar,-

and a supporting arm for the clampin late enneeted to the picker staff to operatively move therewith. V

In witness whereof I-have hereunto set my hand this-22nd day of November 1924. EW R can sters. 

